Crucible of Worlds and Scapeshift in Standard? The world makes no sense anymore! Just kidding -- it's actually really exciting to see such powerful and unique cards get reprinted in a Core Set.
This will make Standard extremely fun format for the next couple of years... and also quite expensive. The original copies of Crucible got as far as $70 per copy. This one is currently holding at $20, but will pretty soon jump as well.
Get it now and quickly, as the price will stabilize at around 40 to 50 dollars. If there is one good investment in Core Set 2019, then it's definitely Crucible of Worlds.